Sabah is one of the 13 member states of Malaysia, and is its easternmost state. It is located on the northern portion of the island of Borneo. It is the second largest state in the country after Sarawak, which it borders on its southwest. It also shares a border with the province of East Kalimantan of Indonesia in the south. The capital of Sabah is Kota Kinabalu, formerly known as Jesselton. Sabah is often referred to as "The Land Below The Wind", a phrase used by seafarers in the past to describe lands south of the typhoon belt.
The western part of Sabah is generally mountainous, containing the three highest mountains in Malaysia. The most prominent range is the Crocker Range which houses several mountains of varying height from about 1,000 metres to 4,000 metres. At the height of 4,095 metres, Mount Kinabalu is the highest mountain in Malay Archipelago (excluding New Guinea) and the 10th highest mountain in political Southeast Asia. The jungles of Sabah are classified as tropical rainforests and host a diverse array of plant and animal species. Kinabalu National Park was inscribed as a World Heritage Site in 2000 because of its richness in plant diversity combined with its unique geological, topographical, and climatic conditions.
Lying nearby Mount Kinabalu is Mount Tambuyukon. With a height of 2,579 metres, it is the third highest peak in the country. Adjacent to the Crocker Range is the Trus Madi Range which houses the second highest peak in the country, Mount Trus Madi, with a height of 2,642 metres. There are lower ranges of hills extending towards the western coasts, southern plains, and the interior or central part of Sabah. These mountains and hills are traversed by an extensive network of river valleys and are in most cases covered with dense rainforest.
The central and eastern portion of Sabah are generally lower mountain ranges and plains with occasional hills. Kinabatangan River begins from the western ranges and snakes its way through the central region towards the east coast out into the Sulu Sea. It is the second longest river in Malaysia after Rajang River at a length of 560 kilometres. The forests surrounding the river valley also contains an array of wildlife habitats, and is the largest forest-covered floodplain in Malaysia.